Are blueberries healthier than grapes?

On the numbers most people are checking, yes. Blueberries have 57 calories and 10g of sugar per 100g against 69 calories and 15.5g of sugar for grapes, plus 2.4g of fiber to the grape's 0.9g. Grapes hold one clear advantage, 191mg of potassium per 100g against 77mg. Both are whole fruit, so this is a preference rather than a warning.

Which has more sugar, grapes or blueberries?

Grapes, by more than half: 15.5g per 100g against 10g. Per cup the gap widens, since a cup of grapes weighs 151g and holds about 23.4g of sugar while a 148g cup of blueberries holds 14.8g. Ten grapes (49g) are 34 calories and roughly 7.6g of sugar, which is why a bowl disappears without anyone noticing.

Which is better for weight loss, grapes or blueberries?

Blueberries, on both calories and fullness. A cup is 84 calories with 3.6g of fiber, where a cup of grapes is 104 calories with 1.4g. Half a cup of blueberries costs 42 calories, an easy place to stop. Grapes are about 81% water and genuinely hydrating, they just go down fast at 104 calories a cup.

Which fruit is better for blood sugar, grapes or blueberries?

Blueberries pair less sugar with more fiber, which is the combination that matters: 10g of sugar and 2.4g of fiber per 100g against the grape's 15.5g and 0.9g. Half a cup of blueberries (74g) works out to 7.4g of sugar. If you want grapes, 10 to 15 of them is about 34 to 52 calories, and eating them alongside protein slows the whole thing down.

Are grapes or blueberries keto-friendly?

Only blueberries come close. They have 12.1g of net carbs per 100g (14.5g of carbs minus 2.4g of fiber), and a half cup lands near 9g. Grapes sit at 17.2g of net carbs per 100g, so a single cup is about 25.9g, which is most of a day on strict keto.

Do grapes or blueberries have more fiber?

Blueberries, by roughly two and a half times: 2.4g per 100g against 0.9g. Per cup that is 3.6g versus 1.4g. Even a half cup of blueberries (74g) carries about 1.8g, more than a full cup of grapes manages.

Do grapes have any advantage over blueberries?

Potassium, mainly. Grapes carry 191mg per 100g, or about 288mg in a cup, against 77mg and 114mg for blueberries. The two tie on protein at 0.7g per 100g and sit within 0.1g of each other on fat. Red and purple grapes supply resveratrol while blueberries supply anthocyanins, so on antioxidants it is a difference in kind rather than a winner.

Grapes

Blueberry

All Comparisons

Grapes vs Blueberries

Blueberry

Wins in 3 of 6 categories

Compare grapes and blueberries calories, sugar, fiber, and net carbs per cup. See which fruit suits weight loss, low-carb eating, and steadier blood sugar.

Verdict (USDA data)

Per 100g (USDA data), Grapes has 69 calories vs Blueberry's 57. Blueberry has more fiber (2.4g vs 0.9g). Pick Blueberry for more fiber.

Sources: Grapes (FDC 174683) · Blueberry (FDC 171711)

Nutrition Comparison (per 100g)

Nutrient	Grapes		Blueberry
Calories	69	vs	57
Protein	0.7g	vs	0.7g
Carbs	18.1g	vs	14.5g
Fat	0.2g	vs	0.3g
Fiber	0.9g	vs	2.4g
Sodium	0mg	vs	0mg

Winner determined by: fewer calories, more protein, fewer carbs, less fat, more fiber, less sodium

Source: USDA FoodData Central. Grapes: FDC 174683 · Blueberry: FDC 171711.

When to Choose Each

Choose Grapes when:

You want more potassium per serving (288mg per cup vs 114mg)
You want a frozen snack that stays 104 calories a cup
You need a portion you can count out (10 grapes, 34 calories)
You're building a cheese board and want the sweeter fruit (15.5g sugar per 100g)

See full Grapes nutrition

Choose Blueberry when:

You're counting calories (57 per 100g vs 69)
You want fiber from your fruit (2.4g per 100g vs 0.9g)
You're eating low-carb or keto (12.1g net carbs per 100g vs 17.2g)
You're limiting sugar (14.8g per cup vs 23.4g)

See full Blueberry nutrition

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Last updated: 2026-08-12

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